src/thumb_standard.c

   1 /*
   2  * Geeqie
   3  * (C) 2006 John Ellis
   4  * Copyright (C) 2008 - 2009 The Geeqie Team
   5  *
   6  * Author: John Ellis
   7  *
   8  * This software is released under the GNU General Public License (GNU GPL).
   9  * Please read the included file COPYING for more information.
  10  * This software comes with no warranty of any kind, use at your own risk!
  11  */
  12
  13
  14 #include "main.h"
  15 #include "thumb_standard.h"
  16
  17 #include "image-load.h"
  18 #include "md5-util.h"
  19 #include "pixbuf_util.h"
  20 #include "ui_fileops.h"
  21 #include "filedata.h"
  22 #include "exif.h"
  23 #include "metadata.h"
  24
  25
  26 /*
  27  * This thumbnail caching implementation attempts to conform
  28  * to the Thumbnail Managing Standard proposed on freedesktop.org
  29  * The standard is documented here:
  30  *   http://triq.net/~jens/thumbnail-spec/index.html
  31  *  (why isn't it actually hosted on freedesktop.org?)
  32  *
  33  * This code attempts to conform to version 0.7.0 of the standard.
  34  *
  35  * Notes:
  36  *   > Validation of the thumb's embedded uri is a simple strcmp between our
  37  *     version of the escaped uri and the thumb's escaped uri. But not all uri
  38  *     escape functions escape the same set of chars, comparing the unescaped
  39  *     versions may be more accurate.
  40  *   > Only Thumb::URI and Thumb::MTime are stored in a thumb at this time.
  41  *     Storing the Size, Width, Height should probably be implemented.
  42  */
  43
  44
  45 #define THUMB_SIZE_NORMAL 128
  46 #define THUMB_SIZE_LARGE  256
  47
  48 #define THUMB_MARKER_URI    "tEXt::Thumb::URI"
  49 #define THUMB_MARKER_MTIME  "tEXt::Thumb::MTime"
  50 #define THUMB_MARKER_SIZE   "tEXt::Thumb::Size"
  51 #define THUMB_MARKER_WIDTH  "tEXt::Thumb::Image::Width"
  52 #define THUMB_MARKER_HEIGHT "tEXt::Thumb::Image::Height"
  53 #define THUMB_MARKER_APP    "tEXt::Software"
  54
  55 #define THUMB_PERMS_FOLDER 0700
  56 #define THUMB_PERMS_THUMB  0600
  57
  58
  59
  60 /*
  61  *-----------------------------------------------------------------------------
  62  * thumbnail loader
  63  *-----------------------------------------------------------------------------
  64  */
  65
  66
  67 static void thumb_loader_std_error_cb(ImageLoader *il, gpointer data);
  68 static gint thumb_loader_std_setup(ThumbLoaderStd *tl, FileData *fd);
  69 static gint thumb_loader_std_setup_path(ThumbLoaderStd *tl, const gchar *path);
  70
  71
  72 ThumbLoaderStd *thumb_loader_std_new(gint width, gint height)
  73 {
  74         ThumbLoaderStd *tl;
  75
  76         tl = g_new0(ThumbLoaderStd, 1);
  77
  78         tl->standard_loader = TRUE;
  79         tl->requested_width = width;
  80         tl->requested_height = height;
  81         tl->cache_enable = options->thumbnails.enable_caching;
  82
  83         return tl;
  84 }
  85
  86 void thumb_loader_std_set_callbacks(ThumbLoaderStd *tl,
  87                                     ThumbLoaderStdFunc func_done,
  88                                     ThumbLoaderStdFunc func_error,
  89                                     ThumbLoaderStdFunc func_progress,
  90                                     gpointer data)
  91 {
  92         if (!tl) return;
  93
  94         tl->func_done = func_done;
  95         tl->func_error = func_error;
  96         tl->func_progress = func_progress;
  97         tl->data = data;
  98 }
  99
 100 static void thumb_loader_std_reset(ThumbLoaderStd *tl)
 101 {
 102         image_loader_free(tl->il);
 103         tl->il = NULL;
 104
 105         file_data_unref(tl->fd);
 106         tl->fd = NULL;
 107
 108         g_free(tl->thumb_path);
 109         tl->thumb_path = NULL;
 110
 111         g_free(tl->thumb_uri);
 112         tl->thumb_uri = NULL;
 113         tl->local_uri = NULL;
 114
 115         tl->thumb_path_local = FALSE;
 116
 117         tl->cache_hit = FALSE;
 118
 119         tl->source_mtime = 0;
 120         tl->source_size = 0;
 121         tl->source_mode = 0;
 122
 123         tl->progress = 0.0;
 124 }
 125
 126 static gchar *thumb_std_cache_path(const gchar *path, const gchar *uri, gboolean local,
 127                                    const gchar *cache_subfolder)
 128 {
 129         gchar *result = NULL;
 130         gchar *md5_text;
 131         guchar digest[16];
 132         gchar *name;
 133
 134         if (!path || !uri || !cache_subfolder) return NULL;
 135
 136         md5_get_digest((guchar *)uri, strlen(uri), digest);
 137         md5_text = md5_digest_to_text(digest);
 138
 139         if (!md5_text) return NULL;
 140
 141         name = g_strconcat(md5_text, THUMB_NAME_EXTENSION, NULL);
 142
 143         if (local)
 144                 {
 145                 gchar *base = remove_level_from_path(path);
 146
 147                 result = g_build_filename(base, THUMB_FOLDER_LOCAL, cache_subfolder, name, NULL);
 148                 g_free(base);
 149                 }
 150         else
 151                 {
 152                 result = g_build_filename(homedir(), THUMB_FOLDER_GLOBAL, cache_subfolder, name, NULL);
 153                 }
 154
 155         g_free(name);
 156         g_free(md5_text);
 157
 158         return result;
 159 }
 160
 161 static gchar *thumb_loader_std_cache_path(ThumbLoaderStd *tl, gboolean local, GdkPixbuf *pixbuf, gboolean fail)
 162 {
 163         const gchar *folder;
 164         gint w, h;
 165
 166         if (!tl->fd || !tl->thumb_uri) return NULL;
 167
 168         if (pixbuf)
 169                 {
 170                 w = gdk_pixbuf_get_width(pixbuf);
 171                 h = gdk_pixbuf_get_height(pixbuf);
 172                 }
 173         else
 174                 {
 175                 w = tl->requested_width;
 176                 h = tl->requested_height;
 177                 }
 178
 179         if (fail)
 180                 {
 181                 folder = THUMB_FOLDER_FAIL;
 182                 }
 183         else if (w > THUMB_SIZE_NORMAL || h > THUMB_SIZE_NORMAL)
 184                 {
 185                 folder = THUMB_FOLDER_LARGE;
 186                 }
 187         else
 188                 {
 189                 folder = THUMB_FOLDER_NORMAL;
 190                 }
 191
 192         return thumb_std_cache_path(tl->fd->path,
 193                                     (local) ?  tl->local_uri : tl->thumb_uri,
 194                                     local, folder);
 195 }
 196
 197 static gboolean thumb_loader_std_fail_check(ThumbLoaderStd *tl)
 198 {
 199         gchar *fail_path;
 200         gboolean result = FALSE;
 201
 202         fail_path = thumb_loader_std_cache_path(tl, FALSE, NULL, TRUE);
 203         if (isfile(fail_path))
 204                 {
 205                 GdkPixbuf *pixbuf;
 206
 207                 if (tl->cache_retry)
 208                         {
 209                         pixbuf = NULL;
 210                         }
 211                 else
 212                         {
 213                         gchar *pathl;
 214
 215                         pathl = path_from_utf8(fail_path);
 216                         pixbuf = gdk_pixbuf_new_from_file(pathl, NULL);
 217                         g_free(pathl);
 218                         }
 219
 220                 if (pixbuf)
 221                         {
 222                         const gchar *mtime_str;
 223
 224                         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 225                         if (mtime_str && strtol(mtime_str, NULL, 10) == tl->source_mtime)
 226                                 {
 227                                 result = TRUE;
 228                                 DEBUG_1("thumb fail valid: %s", tl->fd->path);
 229                                 DEBUG_1("           thumb: %s", fail_path);
 230                                 }
 231
 232                         g_object_unref(G_OBJECT(pixbuf));
 233                         }
 234
 235                 if (!result) unlink_file(fail_path);
 236                 }
 237         g_free(fail_path);
 238
 239         return result;
 240 }
 241
 242 static gboolean thumb_loader_std_validate(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 243 {
 244         const gchar *valid_uri;
 245         const gchar *uri;
 246         const gchar *mtime_str;
 247         time_t mtime;
 248         gint w, h;
 249
 250         if (!pixbuf) return FALSE;
 251
 252         w = gdk_pixbuf_get_width(pixbuf);
 253         h = gdk_pixbuf_get_height(pixbuf);
 254
 255         if (w != THUMB_SIZE_NORMAL && w != THUMB_SIZE_LARGE &&
 256             h != THUMB_SIZE_NORMAL && h != THUMB_SIZE_LARGE) return FALSE;
 257
 258         valid_uri = (tl->thumb_path_local) ? tl->local_uri : tl->thumb_uri;
 259
 260         uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 261         mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 262
 263         if (!mtime_str || !uri || !valid_uri) return FALSE;
 264         if (strcmp(uri, valid_uri) != 0) return FALSE;
 265
 266         mtime = strtol(mtime_str, NULL, 10);
 267         if (tl->source_mtime != mtime) return FALSE;
 268
 269         return TRUE;
 270 }
 271
 272 static void thumb_loader_std_save(ThumbLoaderStd *tl, GdkPixbuf *pixbuf)
 273 {
 274         gchar *base_path;
 275         gchar *tmp_path;
 276         gboolean fail;
 277
 278         if (!tl->cache_enable || tl->cache_hit) return;
 279         if (tl->thumb_path) return;
 280
 281         if (!pixbuf)
 282                 {
 283                 /* local failures are not stored */
 284                 if (tl->cache_local) return;
 285
 286                 pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, 1, 1);
 287                 fail = TRUE;
 288                 }
 289         else
 290                 {
 291                 g_object_ref(G_OBJECT(pixbuf));
 292                 fail = FALSE;
 293                 }
 294
 295         tl->thumb_path = thumb_loader_std_cache_path(tl, tl->cache_local, pixbuf, fail);
 296         if (!tl->thumb_path)
 297                 {
 298                 g_object_unref(G_OBJECT(pixbuf));
 299                 return;
 300                 }
 301         tl->thumb_path_local = tl->cache_local;
 302
 303         /* create thumbnail dir if needed */
 304         base_path = remove_level_from_path(tl->thumb_path);
 305         if (tl->cache_local)
 306                 {
 307                 if (!isdir(base_path))
 308                         {
 309                         struct stat st;
 310                         gchar *source_base;
 311
 312                         source_base = remove_level_from_path(tl->fd->path);
 313                         if (stat_utf8(source_base, &st))
 314                                 {
 315                                 recursive_mkdir_if_not_exists(base_path, st.st_mode);
 316                                 }
 317                         g_free(source_base);
 318                         }
 319                 }
 320         else
 321                 {
 322                 recursive_mkdir_if_not_exists(base_path, THUMB_PERMS_FOLDER);
 323                 }
 324         g_free(base_path);
 325
 326         DEBUG_1("thumb saving: %s", tl->fd->path);
 327         DEBUG_1("       saved: %s", tl->thumb_path);
 328
 329         /* save thumb, using a temp file then renaming into place */
 330         tmp_path = unique_filename(tl->thumb_path, ".tmp", "_", 2);
 331         if (tmp_path)
 332                 {
 333                 const gchar *mark_uri;
 334                 gchar *mark_app;
 335                 gchar *mark_mtime;
 336                 gchar *pathl;
 337                 gboolean success;
 338
 339                 mark_uri = (tl->cache_local) ? tl->local_uri :tl->thumb_uri;
 340
 341                 mark_app = g_strdup_printf("%s %s", GQ_APPNAME, VERSION);
 342                 mark_mtime = g_strdup_printf("%lu", tl->source_mtime);
 343
 344                 pathl = path_from_utf8(tmp_path);
 345                 success = gdk_pixbuf_save(pixbuf, pathl, "png", NULL,
 346                                           THUMB_MARKER_URI, mark_uri,
 347                                           THUMB_MARKER_MTIME, mark_mtime,
 348                                           THUMB_MARKER_APP, mark_app,
 349                                           NULL);
 350                 if (success)
 351                         {
 352                         chmod(pathl, (tl->cache_local) ? tl->source_mode : THUMB_PERMS_THUMB);
 353                         success = rename_file(tmp_path, tl->thumb_path);
 354                         }
 355
 356                 g_free(pathl);
 357
 358                 g_free(mark_mtime);
 359                 g_free(mark_app);
 360
 361                 g_free(tmp_path);
 362                 if (!success)
 363                         {
 364                         DEBUG_1("thumb save failed: %s", tl->fd->path);
 365                         DEBUG_1("            thumb: %s", tl->thumb_path);
 366                         }
 367
 368                 }
 369
 370         g_object_unref(G_OBJECT(pixbuf));
 371 }
 372
 373 static void thumb_loader_std_set_fallback(ThumbLoaderStd *tl)
 374 {
 375         if (tl->fd->thumb_pixbuf) g_object_unref(tl->fd->thumb_pixbuf);
 376         tl->fd->thumb_pixbuf = pixbuf_fallback(tl->fd, tl->requested_width, tl->requested_height);
 377 }
 378
 379 static GdkPixbuf *thumb_loader_std_finish(ThumbLoaderStd *tl, GdkPixbuf *pixbuf, gboolean shrunk)
 380 {
 381         GdkPixbuf *pixbuf_thumb = NULL;
 382         GdkPixbuf *result;
 383         GdkPixbuf *rotated = NULL;
 384         gint sw, sh;
 385
 386
 387         if (!tl->cache_hit && options->image.exif_rotate_enable)
 388                 {
 389                 if (!tl->fd->exif_orientation)
 390                         {
 391                         tl->fd->exif_orientation = metadata_read_int(tl->fd, ORIENTATION_KEY, EXIF_ORIENTATION_TOP_LEFT);
 392                         }
 393
 394                 if (tl->fd->exif_orientation != EXIF_ORIENTATION_TOP_LEFT)
 395                         {
 396                         rotated = pixbuf_apply_orientation(pixbuf, tl->fd->exif_orientation);
 397                         pixbuf = rotated;
 398                         }
 399                 }
 400
 401         sw = gdk_pixbuf_get_width(pixbuf);
 402         sh = gdk_pixbuf_get_height(pixbuf);
 403
 404         if (tl->cache_enable)
 405                 {
 406                 if (!tl->cache_hit)
 407                         {
 408                         gint cache_w, cache_h;
 409
 410                         if (tl->requested_width > THUMB_SIZE_NORMAL || tl->requested_height > THUMB_SIZE_NORMAL)
 411                                 {
 412                                 cache_w = cache_h = THUMB_SIZE_LARGE;
 413                                 }
 414                         else
 415                                 {
 416                                 cache_w = cache_h = THUMB_SIZE_NORMAL;
 417                                 }
 418
 419                         if (sw > cache_w || sh > cache_h || shrunk)
 420                                 {
 421                                 gint thumb_w, thumb_h;
 422
 423                                 if (pixbuf_scale_aspect(cache_w, cache_h, sw, sh,
 424                                                                   &thumb_w, &thumb_h))
 425                                         {
 426                                         pixbuf_thumb = gdk_pixbuf_scale_simple(pixbuf, thumb_w, thumb_h,
 427                                                                                (GdkInterpType)options->thumbnails.quality);
 428                                         }
 429                                 else
 430                                         {
 431                                         pixbuf_thumb = pixbuf;
 432                                         g_object_ref(G_OBJECT(pixbuf_thumb));
 433                                         }
 434
 435                                 thumb_loader_std_save(tl, pixbuf_thumb);
 436                                 }
 437                         }
 438                 else if (tl->cache_hit &&
 439                          tl->cache_local && !tl->thumb_path_local)
 440                         {
 441                         /* A local cache save was requested, but a valid thumb is in $HOME,
 442                          * so specifically save as a local thumbnail.
 443                          */
 444                         g_free(tl->thumb_path);
 445                         tl->thumb_path = NULL;
 446
 447                         tl->cache_hit = FALSE;
 448
 449                         DEBUG_1("thumb copied: %s", tl->fd->path);
 450
 451                         thumb_loader_std_save(tl, pixbuf);
 452                         }
 453                 }
 454
 455         if (sw <= tl->requested_width && sh <= tl->requested_height)
 456                 {
 457                 result = pixbuf;
 458                 g_object_ref(result);
 459                 }
 460         else
 461                 {
 462                 gint thumb_w, thumb_h;
 463
 464                 if (pixbuf_thumb)
 465                         {
 466                         pixbuf = pixbuf_thumb;
 467                         sw = gdk_pixbuf_get_width(pixbuf);
 468                         sh = gdk_pixbuf_get_height(pixbuf);
 469                         }
 470
 471                 if (pixbuf_scale_aspect(tl->requested_width, tl->requested_height, sw, sh,
 472                                                   &thumb_w, &thumb_h))
 473                         {
 474                         result = gdk_pixbuf_scale_simple(pixbuf, thumb_w, thumb_h,
 475                                                          (GdkInterpType)options->thumbnails.quality);
 476                         }
 477                 else
 478                         {
 479                         result = pixbuf;
 480                         g_object_ref(result);
 481                         }
 482                 }
 483
 484         if (pixbuf_thumb) g_object_unref(pixbuf_thumb);
 485         if (rotated) g_object_unref(rotated);
 486
 487         return result;
 488 }
 489
 490 static gboolean thumb_loader_std_next_source(ThumbLoaderStd *tl, gboolean remove_broken)
 491 {
 492         image_loader_free(tl->il);
 493         tl->il = NULL;
 494
 495         if (tl->thumb_path)
 496                 {
 497                 if (!tl->thumb_path_local && remove_broken)
 498                         {
 499                         DEBUG_1("thumb broken, unlinking: %s", tl->thumb_path);
 500                         unlink_file(tl->thumb_path);
 501                         }
 502
 503                 g_free(tl->thumb_path);
 504                 tl->thumb_path = NULL;
 505
 506                 if (!tl->thumb_path_local)
 507                         {
 508                         tl->thumb_path = thumb_loader_std_cache_path(tl, TRUE, NULL, FALSE);
 509                         if (isfile(tl->thumb_path) && thumb_loader_std_setup_path(tl, tl->thumb_path))
 510                                 {
 511                                 tl->thumb_path_local = TRUE;
 512                                 return TRUE;
 513                                 }
 514
 515                         g_free(tl->thumb_path);
 516                         tl->thumb_path = NULL;
 517                         }
 518
 519                 if (thumb_loader_std_setup(tl, tl->fd)) return TRUE;
 520                 }
 521
 522         thumb_loader_std_save(tl, NULL);
 523         return FALSE;
 524 }
 525
 526 static void thumb_loader_std_done_cb(ImageLoader *il, gpointer data)
 527 {
 528         ThumbLoaderStd *tl = data;
 529         GdkPixbuf *pixbuf;
 530
 531         DEBUG_1("thumb image done: %s", tl->fd ? tl->fd->path : "???");
 532         DEBUG_1("            from: %s", image_loader_get_fd(tl->il)->path);
 533
 534         pixbuf = image_loader_get_pixbuf(tl->il);
 535         if (!pixbuf)
 536                 {
 537                 DEBUG_1("...but no pixbuf");
 538                 thumb_loader_std_error_cb(il, data);
 539                 return;
 540                 }
 541
 542         if (tl->thumb_path && !thumb_loader_std_validate(tl, pixbuf))
 543                 {
 544                 if (thumb_loader_std_next_source(tl, TRUE)) return;
 545
 546                 if (tl->func_error) tl->func_error(tl, tl->data);
 547                 return;
 548                 }
 549
 550         tl->cache_hit = (tl->thumb_path != NULL);
 551
 552         if (tl->fd)
 553                 {
 554                 if (tl->fd->thumb_pixbuf) g_object_unref(tl->fd->thumb_pixbuf);
 555                 tl->fd->thumb_pixbuf = thumb_loader_std_finish(tl, pixbuf, image_loader_get_shrunk(il));
 556                 }
 557
 558         if (tl->func_done) tl->func_done(tl, tl->data);
 559 }
 560
 561 static void thumb_loader_std_error_cb(ImageLoader *il, gpointer data)
 562 {
 563         ThumbLoaderStd *tl = data;
 564
 565         /* if at least some of the image is available, go to done */
 566         if (image_loader_get_pixbuf(tl->il) != NULL)
 567                 {
 568                 thumb_loader_std_done_cb(il, data);
 569                 return;
 570                 }
 571
 572         DEBUG_1("thumb image error: %s", tl->fd->path);
 573         DEBUG_1("             from: %s", image_loader_get_fd(tl->il)->path);
 574
 575         if (thumb_loader_std_next_source(tl, TRUE)) return;
 576
 577         thumb_loader_std_set_fallback(tl);
 578
 579         if (tl->func_error) tl->func_error(tl, tl->data);
 580 }
 581
 582 static void thumb_loader_std_progress_cb(ImageLoader *il, gdouble percent, gpointer data)
 583 {
 584         ThumbLoaderStd *tl = data;
 585
 586         tl->progress = (gdouble)percent;
 587
 588         if (tl->func_progress) tl->func_progress(tl, tl->data);
 589 }
 590
 591 static gboolean thumb_loader_std_setup(ThumbLoaderStd *tl, FileData *fd)
 592 {
 593         tl->il = image_loader_new(fd);
 594         image_loader_set_priority(tl->il, G_PRIORITY_LOW);
 595
 596         /* this will speed up jpegs by up to 3x in some cases */
 597         if (tl->requested_width <= THUMB_SIZE_NORMAL &&
 598             tl->requested_height <= THUMB_SIZE_NORMAL)
 599                 {
 600                 image_loader_set_requested_size(tl->il, THUMB_SIZE_NORMAL, THUMB_SIZE_NORMAL);
 601                 }
 602         else
 603                 {
 604                 image_loader_set_requested_size(tl->il, THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 605                 }
 606
 607         g_signal_connect(G_OBJECT(tl->il), "error", (GCallback)thumb_loader_std_error_cb, tl);
 608         if (tl->func_progress)
 609                 {
 610                 g_signal_connect(G_OBJECT(tl->il), "percent", (GCallback)thumb_loader_std_progress_cb, tl);
 611                 }
 612         g_signal_connect(G_OBJECT(tl->il), "done", (GCallback)thumb_loader_std_done_cb, tl);
 613
 614         if (image_loader_start(tl->il))
 615                 {
 616                 return TRUE;
 617                 }
 618
 619         image_loader_free(tl->il);
 620         tl->il = NULL;
 621         return FALSE;
 622 }
 623
 624 static gboolean thumb_loader_std_setup_path(ThumbLoaderStd *tl, const gchar *path)
 625 {
 626         FileData *fd = file_data_new_simple(path);
 627         gboolean ret = thumb_loader_std_setup(tl, fd);
 628         file_data_unref(fd);
 629         return ret;
 630 }
 631
 632 /*
 633  * Note: Currently local_cache only specifies where to save a _new_ thumb, if
 634  *       a valid existing thumb is found anywhere the local thumb will not be created.
 635  */
 636 void thumb_loader_std_set_cache(ThumbLoaderStd *tl, gboolean enable_cache, gboolean local, gboolean retry_failed)
 637 {
 638         if (!tl) return;
 639
 640         tl->cache_enable = enable_cache;
 641         tl->cache_local = local;
 642         tl->cache_retry = retry_failed;
 643 }
 644
 645 gboolean thumb_loader_std_start(ThumbLoaderStd *tl, FileData *fd)
 646 {
 647         static gchar *thumb_cache = NULL;
 648         struct stat st;
 649
 650         if (!tl || !fd) return FALSE;
 651
 652         thumb_loader_std_reset(tl);
 653
 654
 655         tl->fd = file_data_ref(fd);
 656         if (!stat_utf8(fd->path, &st))
 657                 {
 658                 thumb_loader_std_set_fallback(tl);
 659                 return FALSE;
 660                 }
 661         tl->source_mtime = st.st_mtime;
 662         tl->source_size = st.st_size;
 663         tl->source_mode = st.st_mode;
 664
 665         if (!thumb_cache) thumb_cache = g_build_filename(homedir(), THUMB_FOLDER_GLOBAL, NULL);
 666         if (strncmp(tl->fd->path, thumb_cache, strlen(thumb_cache)) != 0)
 667                 {
 668                 gchar *pathl;
 669
 670                 pathl = path_from_utf8(fd->path);
 671                 tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
 672                 tl->local_uri = filename_from_path(tl->thumb_uri);
 673                 g_free(pathl);
 674                 }
 675
 676         if (tl->cache_enable)
 677                 {
 678                 gint found;
 679
 680                 tl->thumb_path = thumb_loader_std_cache_path(tl, FALSE, NULL, FALSE);
 681                 tl->thumb_path_local = FALSE;
 682
 683                 found = isfile(tl->thumb_path);
 684                 if (found && thumb_loader_std_setup_path(tl, tl->thumb_path)) return TRUE;
 685
 686                 if (thumb_loader_std_fail_check(tl) ||
 687                     !thumb_loader_std_next_source(tl, found))
 688                         {
 689                         thumb_loader_std_set_fallback(tl);
 690                         return FALSE;
 691                         }
 692                 return TRUE;
 693                 }
 694
 695         if (!thumb_loader_std_setup(tl, tl->fd))
 696                 {
 697                 thumb_loader_std_save(tl, NULL);
 698                 thumb_loader_std_set_fallback(tl);
 699                 return FALSE;
 700                 }
 701
 702         return TRUE;
 703 }
 704
 705 void thumb_loader_std_free(ThumbLoaderStd *tl)
 706 {
 707         if (!tl) return;
 708
 709         thumb_loader_std_reset(tl);
 710         g_free(tl);
 711 }
 712
 713 GdkPixbuf *thumb_loader_std_get_pixbuf(ThumbLoaderStd *tl)
 714 {
 715         GdkPixbuf *pixbuf;
 716
 717         if (tl && tl->fd && tl->fd->thumb_pixbuf)
 718                 {
 719                 pixbuf = tl->fd->thumb_pixbuf;
 720                 g_object_ref(pixbuf);
 721                 }
 722         else
 723                 {
 724                 pixbuf = pixbuf_fallback(NULL, tl->requested_width, tl->requested_height);
 725                 }
 726
 727         return pixbuf;
 728 }
 729
 730
 731 typedef struct _ThumbValidate ThumbValidate;
 732 struct _ThumbValidate
 733 {
 734         ThumbLoaderStd *tl;
 735         gchar *path;
 736         gint days;
 737
 738         void (*func_valid)(const gchar *path, gboolean valid, gpointer data);
 739         gpointer data;
 740
 741         guint idle_id; /* event source id */
 742 };
 743
 744 static void thumb_loader_std_thumb_file_validate_free(ThumbValidate *tv)
 745 {
 746         thumb_loader_std_free(tv->tl);
 747         g_free(tv->path);
 748         g_free(tv);
 749 }
 750
 751 void thumb_loader_std_thumb_file_validate_cancel(ThumbLoaderStd *tl)
 752 {
 753         ThumbValidate *tv;
 754
 755         if (!tl) return;
 756
 757         tv = tl->data;
 758
 759         if (tv->idle_id)
 760                 {
 761                 g_source_remove(tv->idle_id);
 762                 tv->idle_id = 0;
 763                 }
 764
 765         thumb_loader_std_thumb_file_validate_free(tv);
 766 }
 767
 768 static void thumb_loader_std_thumb_file_validate_finish(ThumbValidate *tv, gboolean valid)
 769 {
 770         if (tv->func_valid) tv->func_valid(tv->path, valid, tv->data);
 771
 772         thumb_loader_std_thumb_file_validate_free(tv);
 773 }
 774
 775 static void thumb_loader_std_thumb_file_validate_done_cb(ThumbLoaderStd *tl, gpointer data)
 776 {
 777         ThumbValidate *tv = data;
 778         GdkPixbuf *pixbuf;
 779         gboolean valid = FALSE;
 780
 781         /* get the original thumbnail pixbuf (unrotated, with original options)
 782            this is called from image_loader done callback, so tv->tl->il must exist*/
 783         pixbuf = image_loader_get_pixbuf(tv->tl->il);
 784         if (pixbuf)
 785                 {
 786                 const gchar *uri;
 787                 const gchar *mtime_str;
 788
 789                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 790                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 791                 if (uri && mtime_str)
 792                         {
 793                         if (strncmp(uri, "file:", strlen("file:")) == 0)
 794                                 {
 795                                 struct stat st;
 796                                 gchar *target;
 797
 798                                 target = g_filename_from_uri(uri, NULL, NULL);
 799                                 if (stat(target, &st) == 0 &&
 800                                     st.st_mtime == strtol(mtime_str, NULL, 10))
 801                                         {
 802                                         valid = TRUE;
 803                                         }
 804                                 g_free(target);
 805                                 }
 806                         else
 807                                 {
 808                                 struct stat st;
 809
 810                                 DEBUG_1("thumb uri foreign, doing day check: %s", uri);
 811
 812                                 if (stat_utf8(tv->path, &st))
 813                                         {
 814                                         time_t now;
 815
 816                                         now = time(NULL);
 817                                         if (st.st_atime >= now - (time_t)tv->days * 24 * 60 * 60)
 818                                                 {
 819                                                 valid = TRUE;
 820                                                 }
 821                                         }
 822                                 }
 823                         }
 824                 else
 825                         {
 826                         DEBUG_1("invalid image found in std cache: %s", tv->path);
 827                         }
 828                 }
 829
 830         thumb_loader_std_thumb_file_validate_finish(tv, valid);
 831 }
 832
 833 static void thumb_loader_std_thumb_file_validate_error_cb(ThumbLoaderStd *tl, gpointer data)
 834 {
 835         ThumbValidate *tv = data;
 836
 837         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 838 }
 839
 840 static gboolean thumb_loader_std_thumb_file_validate_idle_cb(gpointer data)
 841 {
 842         ThumbValidate *tv = data;
 843
 844         tv->idle_id = 0;
 845         thumb_loader_std_thumb_file_validate_finish(tv, FALSE);
 846
 847         return FALSE;
 848 }
 849
 850 ThumbLoaderStd *thumb_loader_std_thumb_file_validate(const gchar *thumb_path, gint allowed_days,
 851                                                      void (*func_valid)(const gchar *path, gboolean valid, gpointer data),
 852                                                      gpointer data)
 853 {
 854         ThumbValidate *tv;
 855
 856         tv = g_new0(ThumbValidate, 1);
 857
 858         tv->tl = thumb_loader_std_new(THUMB_SIZE_LARGE, THUMB_SIZE_LARGE);
 859         thumb_loader_std_set_callbacks(tv->tl,
 860                                        thumb_loader_std_thumb_file_validate_done_cb,
 861                                        thumb_loader_std_thumb_file_validate_error_cb,
 862                                        NULL,
 863                                        tv);
 864         thumb_loader_std_reset(tv->tl);
 865
 866         tv->path = g_strdup(thumb_path);
 867         tv->days = allowed_days;
 868         tv->func_valid = func_valid;
 869         tv->data = data;
 870
 871         if (!thumb_loader_std_setup_path(tv->tl, thumb_path))
 872                 {
 873                 tv->idle_id = g_idle_add(thumb_loader_std_thumb_file_validate_idle_cb, tv);
 874                 }
 875         else
 876                 {
 877                 tv->idle_id = 0;
 878                 }
 879
 880         return tv->tl;
 881 }
 882
 883 static void thumb_std_maint_remove_one(const gchar *source, const gchar *uri, gboolean local,
 884                                        const gchar *subfolder)
 885 {
 886         gchar *thumb_path;
 887
 888         thumb_path = thumb_std_cache_path(source,
 889                                           (local) ? filename_from_path(uri) : uri,
 890                                           local, subfolder);
 891         if (isfile(thumb_path))
 892                 {
 893                 DEBUG_1("thumb removing: %s", thumb_path);
 894                 unlink_file(thumb_path);
 895                 }
 896         g_free(thumb_path);
 897 }
 898
 899 /* this also removes local thumbnails (the source is gone so it makes sense) */
 900 void thumb_std_maint_removed(const gchar *source)
 901 {
 902         gchar *uri;
 903         gchar *sourcel;
 904
 905         sourcel = path_from_utf8(source);
 906         uri = g_filename_to_uri(sourcel, NULL, NULL);
 907         g_free(sourcel);
 908
 909         /* all this to remove a thumbnail? */
 910
 911         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_NORMAL);
 912         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_LARGE);
 913         thumb_std_maint_remove_one(source, uri, FALSE, THUMB_FOLDER_FAIL);
 914         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_NORMAL);
 915         thumb_std_maint_remove_one(source, uri, TRUE, THUMB_FOLDER_LARGE);
 916
 917         g_free(uri);
 918 }
 919
 920 typedef struct _TMaintMove TMaintMove;
 921 struct _TMaintMove
 922 {
 923         gchar *source;
 924         gchar *dest;
 925
 926         ThumbLoaderStd *tl;
 927         gchar *source_uri;
 928         gchar *thumb_path;
 929
 930         gint pass;
 931 };
 932
 933 static GList *thumb_std_maint_move_list = NULL;
 934 static GList *thumb_std_maint_move_tail = NULL;
 935
 936
 937 static void thumb_std_maint_move_step(TMaintMove *tm);
 938 static gboolean thumb_std_maint_move_idle(gpointer data);
 939
 940
 941 static void thumb_std_maint_move_validate_cb(const gchar *path, gboolean valid, gpointer data)
 942 {
 943         TMaintMove *tm = data;
 944         GdkPixbuf *pixbuf;
 945
 946         /* get the original thumbnail pixbuf (unrotated, with original options)
 947            this is called from image_loader done callback, so tm->tl->il must exist*/
 948         pixbuf = image_loader_get_pixbuf(tm->tl->il);
 949         if (pixbuf)
 950                 {
 951                 const gchar *uri;
 952                 const gchar *mtime_str;
 953
 954                 uri = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_URI);
 955                 mtime_str = gdk_pixbuf_get_option(pixbuf, THUMB_MARKER_MTIME);
 956
 957                 if (uri && mtime_str && strcmp(uri, tm->source_uri) == 0)
 958                         {
 959                         gchar *pathl;
 960
 961                         /* The validation utility abuses ThumbLoader, and we
 962                          * abuse the utility just to load the thumbnail,
 963                          * but the loader needs to look sane for the save to complete.
 964                          */
 965
 966                         tm->tl->cache_enable = TRUE;
 967                         tm->tl->cache_hit = FALSE;
 968                         tm->tl->cache_local = FALSE;
 969
 970                         file_data_unref(tm->tl->fd);
 971                         tm->tl->fd = file_data_new_simple(tm->dest);
 972                         tm->tl->source_mtime = strtol(mtime_str, NULL, 10);
 973
 974                         pathl = path_from_utf8(tm->tl->fd->path);
 975                         g_free(tm->tl->thumb_uri);
 976                         tm->tl->thumb_uri = g_filename_to_uri(pathl, NULL, NULL);
 977                         tm->tl->local_uri = filename_from_path(tm->tl->thumb_uri);
 978                         g_free(pathl);
 979
 980                         g_free(tm->tl->thumb_path);
 981                         tm->tl->thumb_path = NULL;
 982                         tm->tl->thumb_path_local = FALSE;
 983
 984                         DEBUG_1("thumb move attempting save:");
 985
 986                         thumb_loader_std_save(tm->tl, pixbuf);
 987                         }
 988
 989                 DEBUG_1("thumb move unlink: %s", tm->thumb_path);
 990                 unlink_file(tm->thumb_path);
 991                 }
 992
 993         thumb_std_maint_move_step(tm);
 994 }
 995
 996 static void thumb_std_maint_move_step(TMaintMove *tm)
 997 {
 998         const gchar *folder;
 999
1000         tm->pass++;
1001         if (tm->pass > 2)
1002                 {
1003                 g_free(tm->source);
1004                 g_free(tm->dest);
1005                 g_free(tm->source_uri);
1006                 g_free(tm->thumb_path);
1007                 g_free(tm);
1008
1009                 if (thumb_std_maint_move_list)
1010                         {
1011                         g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1012                         }
1013
1014                 return;
1015                 }
1016
1017         folder = (tm->pass == 1) ? THUMB_FOLDER_NORMAL : THUMB_FOLDER_LARGE;
1018
1019         g_free(tm->thumb_path);
1020         tm->thumb_path = thumb_std_cache_path(tm->source, tm->source_uri, FALSE, folder);
1021         tm->tl = thumb_loader_std_thumb_file_validate(tm->thumb_path, 0,
1022                                                       thumb_std_maint_move_validate_cb, tm);
1023 }
1024
1025 static gboolean thumb_std_maint_move_idle(gpointer data)
1026 {
1027         TMaintMove *tm;
1028         gchar *pathl;
1029
1030         if (!thumb_std_maint_move_list) return FALSE;
1031
1032         tm = thumb_std_maint_move_list->data;
1033
1034         thumb_std_maint_move_list = g_list_remove(thumb_std_maint_move_list, tm);
1035         if (!thumb_std_maint_move_list) thumb_std_maint_move_tail = NULL;
1036
1037         pathl = path_from_utf8(tm->source);
1038         tm->source_uri = g_filename_to_uri(pathl, NULL, NULL);
1039         g_free(pathl);
1040
1041         tm->pass = 0;
1042
1043         thumb_std_maint_move_step(tm);
1044
1045         return FALSE;
1046 }
1047
1048 /* This will schedule a move of the thumbnail for source image to dest when idle.
1049  * We do this so that file renaming or moving speed is not sacrificed by
1050  * moving the thumbnails at the same time because:
1051  *
1052  * This cache design requires the tedious task of loading the png thumbnails and saving them.
1053  *
1054  * The thumbnails are processed when the app is idle. If the app
1055  * exits early well too bad - they can simply be regenerated from scratch.
1056  *
1057  * This does not manage local thumbnails (fixme ?)
1058  */
1059 void thumb_std_maint_moved(const gchar *source, const gchar *dest)
1060 {
1061         TMaintMove *tm;
1062
1063         tm = g_new0(TMaintMove, 1);
1064         tm->source = g_strdup(source);
1065         tm->dest = g_strdup(dest);
1066
1067         if (!thumb_std_maint_move_list)
1068                 {
1069                 g_idle_add_full(G_PRIORITY_LOW, thumb_std_maint_move_idle, NULL, NULL);
1070                 }
1071
1072         if (thumb_std_maint_move_tail)
1073                 {
1074                 thumb_std_maint_move_tail = g_list_append(thumb_std_maint_move_tail, tm);
1075                 thumb_std_maint_move_tail = thumb_std_maint_move_tail->next;
1076                 }
1077         else
1078                 {
1079                 thumb_std_maint_move_list = g_list_append(thumb_std_maint_move_list, tm);
1080                 thumb_std_maint_move_tail = thumb_std_maint_move_list;
1081                 }
1082 }
1083 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */